When travelers think of Phu Yen, Vietnam, their minds often wander to the sun-drenched beaches of Bai Xep or the dramatic cliffs of Da Dia Reef. But venture just a bit inland, and you’ll discover one of the province’s most serene and culturally rich landscapes — O Loan Lagoon. Tucked between the rolling hills and the East Sea, this expansive brackish lagoon offers more than just postcard-perfect views. It’s a tranquil haven where nature and tradition harmoniously intertwine.
With its calm, mirror-like waters reflecting fiery sunsets, and traditional fishing boats dotting the horizon, O Loan Lagoon captivates visitors with a sense of timelessness. Here, you can witness the rhythms of daily life in a fishing village, taste fresh-caught seafood straight from the water, and immerse yourself in stories passed down through generations. Whether you’re a nature lover, a foodie, or a curious traveler seeking authentic local culture, this hidden gem promises experiences that linger long after your journey ends.
Here are the top 5 things to do at O Loan Lagoon, a scenic wonder that reveals a quieter, more soulful side of Phu Yen.

Take a Scenic Boat Tour Across O Loan Lagoon
One of the best ways to appreciate the full beauty of O Loan Lagoon is from the water. Hop on a small wooden boat operated by local fishermen and drift through the tranquil waters of the lagoon. As you glide across the surface, you’ll be surrounded by views of forested hills, lush mangroves, and distant villages that dot the shoreline.
The peaceful setting is often accompanied by the sound of birds chirping and the occasional splash of a fish. Boat tours on O Loan Lagoon offer visitors the perfect opportunity to slow down, breathe in the fresh air, and take in the natural beauty of Phu Yen. Early morning or late afternoon is the best time to take a tour when the light softens the landscape and creates ideal conditions for photography.
Many boatmen also share insights about the lagoon’s history and ecology during the tour, making it an educational experience as well. For travelers looking for off-the-beaten-path things to do in Phu Yen, a boat tour at O Loan Lagoon is a must.
Enjoy a Fresh and Flavorful Seafood Feast
O Loan Lagoon is famous not just for its views, but also for its bounty of fresh seafood. Thanks to its unique ecosystem of both salt and freshwater, the lagoon is home to a variety of aquatic species, including oysters, blood cockles, shrimp, crabs, and fish. Local fishermen harvest these daily and serve them fresh at small, family-run restaurants located along the lagoon’s edge.
One of the must-try dishes is the grilled O Loan oyster — a delicacy that’s best enjoyed with a splash of lime and a pinch of salt and pepper. Blood cockles, served steamed or stir-fried with garlic and chili, are another favorite among locals and visitors alike. The seafood is not only delicious but also incredibly affordable, making it a highlight of any trip to O Loan Lagoon.
Some restaurants even allow you to pick your seafood fresh from tanks or baskets before it’s prepared, adding to the charm of the experience. For food lovers and culinary explorers, dining by the water at O Loan Lagoon is a flavorful adventure that can’t be missed.
Visit the Surrounding Fishing Villages
The communities surrounding O Loan Lagoon are home to generations of fishermen and their families, many of whom live in traditional stilt houses near the water. These villages offer an authentic look into the rhythm of daily life in rural Phu Yen. Early in the morning, you can witness the fishermen preparing their nets and setting off into the lagoon in their small boats.
Walking or biking through these villages gives you the chance to interact with locals, explore colorful markets, and observe how life revolves around the lagoon. Villagers are often warm and welcoming, especially to visitors who show interest in their traditions and lifestyle.
Don’t miss the opportunity to try home-cooked seafood meals or observe fish-drying practices — an integral part of the local economy. Photography enthusiasts will love capturing scenes of simple, peaceful life, complete with children playing by the water and boats bobbing gently in the breeze.
Watch the Magical Sunset Over O Loan Lagoon
As the sun begins to dip behind the distant hills, O Loan Lagoon transforms into a canvas of warm colors. The skies turn shades of orange, pink, and purple, while the still waters of the lagoon reflect the colors like a mirror. Watching the sunset here is a tranquil and almost meditative experience.
Locals and travelers alike often gather on the banks of the lagoon or near the small bridges that cross it to enjoy this daily spectacle. If you’re traveling with a camera, make sure to bring it — the golden hour light is ideal for landscape photography.
The quiet, untouched setting of O Loan Lagoon allows you to enjoy the sunset without crowds or city noise. It’s an unforgettable way to end a day of exploration in Phu Yen.
Pack a picnic or grab snacks from nearby vendors and make an evening of it. Whether you’re a solo traveler, a couple, or with friends, sunset at O Loan Lagoon is sure to be a highlight of your trip.
Discover the Birdlife and Natural Ecosystems of the Lagoon
O Loan Lagoon is more than just a pretty landscape — it’s also a thriving ecosystem. The mixture of freshwater and saltwater creates a habitat that supports diverse flora and fauna. The lagoon is a haven for birdwatchers, as many species of waterbirds, including storks, herons, and kingfishers, can be spotted here.
The mangroves and reeds along the shore offer nesting grounds and feeding areas, making O Loan Lagoon one of the best places in Phu Yen to observe native birdlife. If you’re into eco-tourism or simply appreciate the natural world, bring a pair of binoculars and take your time exploring.
Local environmental groups occasionally offer eco-tours that focus on the conservation efforts being made to protect the lagoon’s biodiversity. These tours provide insight into the delicate balance of ecosystems and the ways in which local communities are working to preserve their environment.
This connection between people and nature is what makes O Loan Lagoon such a special destination. It’s a reminder of the importance of sustainability and the beauty that arises when human life and nature exist in harmony.
